Best of 2007

21 & Under: Hottest Breakout Stars

Zac! Rihanna! Shia! Lauren! These kids aren't only the most popular, they're also the most likely to get bigger in '08. By Aaron Parsley

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THE HEARTTHROB

With the worldwide sensation High School Musical 2 breaking records and his big screen debut in Hairspray, Zac Efron, 20, proved that he's going to be making girls scream for a long, long time.

25 Best Celeb Photos of '07

25 Best Celeb Photos of '07

It's a Star Tracks bonanza! Brad the Dad, Ashlee's prom night, Lindsay in a bikini (and an ankle bracelet) and more

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